液压支架的侧推装置由（）组成。A.侧推千斤顶 B.弹簧筒 C.侧护板 D.导向杆 E

When the famous dancer Fred Astaire was interviewed for a job by a Hollywood producer, the movie “expert” turned him down, saying, “Can't sing. Can't act. Dances a little.” Here's another stupid mistake. When the great scientist Albert Einstein was at school, his teachers considered him rather dull. And a final story, the famous Polish pianist Paderewski was told by a teacher that he'd never be a success as a performer because the middle finger on each hand was too short.

What lessons can be drawn from these three experiences? First, true genius(天才) cannot be suppressed(压抑). For some reason or other it works its way out. Second, early judgements of a person's abilities may be unfair or just wrong. Third, when there is a real determination to succeed, obstacles fall by the wayside.

The famous motto “ad astra per aspera” can be translated as “To the stars through hardships.” Astaire, Einstein and Paderewski proved their critics wrong.

45.Which of the following best expresses the main idea of the passage?

A.Fred Astaire was a famous dancer.

B.True ability will always make itself known.

C.Some people never get discouraged    

D.Albert Einstein proved his teachers wrong.

46.When Paderewski's teachers told him he'd never be a success, they were ______.

A.being humorous                    B.cheerful, though concerned

C.somewhat hesitant                  D.seriously mistaken

47.“Ad astra per aspera” is used in the passage ______.

A.as a motto for the three men's lives

B.to show the value of Latin

C.to send the reader to the dictionary

D.to point out that genius is always recognized early

48.The writer of the passage thinks that the reader ______. 

A.knows that the three men were successes

B.someday dreams to become like one of the men

C.sympathizes with(同情) the poor teachers of the three men 

D.knows that Fred Astaire was an actor famous for performing

Shakespeare's plays

危害分析和关键控制点的英文缩写是（）

A.HDCCP

B.HNCCP

C.HACCP

D.HECCP

E.HMCCP

这是一位教师执教《早操》巩固识字的片段；
师：请从“苹果树”上摘一个带有你认识的字的“苹果”贴到黑板上。(教师出示教具苹果树)
学生纷纷争抢“苹果”。(共10个字，没摘到字的同学又回到座位上)
师：老师帮你们贴到黑板上。(贴的位置要高)
生：“做操”贴到哪儿好呢 (还剩一个词语)
师：大家一起看一看，贴到哪儿好呢
生：贴在下边好!
生：贴在题目旁边。
生：……
师：还是贴在中间好一些。(教师把字贴在小露珠、小鸟、小蜜蜂中间，形成环行板书)
师：请把自己摘的“苹果”上的字领大家读一读。(学生依次领读词语)
问题：你是怎样看待以上教学的 请发表你的观点。

进行性肌营养不良的临床特点，下列描述不正确的是（）

A.肌肉出现对称性的无力

B.肌肉无力常伴有肌肉疼痛

C.肌肉无力一般近端重于远端

D.肌电图可以发现肌源性的改变

E.一般伴随肌酶升高

某安装公司承接了一新建供暖厂的建设合同。设备安装量有4台引风机、8台鼓风机、2台20t桥式起重机、26台水泵、4台胶带输机、10台螺旋输机、2台斗式提升机、2台振动筛的安装。引风机经过就位、地脚螺栓灌浆、初找、精找等工序，最先达到了单机试车的条件，机械工程师编制了单机试运方案，直接报送业主，获得批准后，立即组织了单机试运并完善了各项安装和试车记录，其各项参数符合技术文件的要求。螺旋给料机的减速箱散件到货，设备安装人员清洗了各部件后，就将各机件装配到机座上。在随后螺旋给料机的无负荷试运时发现设备振动大，用听针检查发现减速箱内有撞击声，减速箱轴承温度高。运行21分钟后停机，将减速箱解体调整后，又继续补完螺旋给料机无负荷试车不足的1小时39分钟，上述超标现象消失。在进行煮炉和烘炉后，项目部认为整个流程具备联运条件，遂编制了联运方案，经项目总工程师批准后，报监理审批。在联运时再次开启引风机，却发现引风机振动过大，并损坏了一台引风机的轴承压盖。项目部启动质量事故程序，由技术员组织施工班组查找故障原因。找到了原因，经过处理，终于让引风机恢复了正常工作。质量事故程序关闭。

详细分析螺旋给料机减速箱故障的原因。